Buoy



FIG. 1 is a perspective view of my invention;

FIG. 2 is a front plan view;

FIG. 3 is a rear plan view;

FIG. 4 is a side plan view;

FIG. 5 is a plan view of the side opposite FIG. 4;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a buoy, as shown and described. 